Single power supply module / dual power feeds, Dual power supply modules / dual power feeds – ADTRAN MX2800 M13 User Manual
Page 165
MX2800 M13 Multiplexer User Manual
Acceptance Test Procedure, Appendix A
61200290L1-1G
A-9
Single Power Supply Module / Dual Power Feeds
When the MX2800 is equipped with only a single Power Supply module, there is no protection against a
failure of the module itself. However, the single Power Supply is capable of utilizing the
A
and
B
power
feeds to protect against a failure in one of the power sources feeding the shelf. To verify that the MX2800
is properly utilizing the
A
and
B
power feeds, the following procedure is recommended:
1. With the MX2800 installed and operating normally, go to the fuse panel at the top of the bay and
remove the fuse corresponding to the
A
power feed for the MX2800 shelf. Removing this fuse should
have no effect on the operation of the shelf because the MX2800 is operating on the
B
power feed.
2. Reinsert the fuse for the
A
power feed.
3. Now, remove the
B
power feed fuse for the MX2800 shelf. Once again, there should be no effect on
the operation of the shelf because the MX2800 is operating on the
A
power feed.
4. Reinsert the fuse for the
B
power feed.
Dual Power Supply Modules / Dual Power Feeds
When the MX2800 is equipped with two Power Supply modules and also wired to support dual power
feeds, the shelf is protected against a failure of either of the Power Supply cards or a failure of one of the
power sources feeding the shelf. Use the following procedure to confirm the operation of this fully redun-
dant configuration:
1. With the MX2800 installed and operating normally, remove the
A
Power Supply card (the one on the
left). Removing this card should have no effect on the operation of the shelf because the MX2800 is
operating on the
B
Power Supply.
2. Go to the fuse panel at the top of the bay and remove the fuse corresponding to the
A
power feed.
Removing this fuse should have no effect on the operation of the shelf because the
B
Power Supply is
running on the
B
power feed.
3. Reinsert the fuse for the
A
power feed.
4. Remove the fuse corresponding to the
B
power feed to the shelf. Doing so should have no effect on the
operation of the shelf as the
B
Power Supply is operating on the
A
power feed.
5. Reinsert the fuse for the
B
power feed.
6. Reinsert the
A
Power Supply into the MX2800 chassis.
7. Remove the
B
Power Supply card (the one on the right). Doing so should have no effect on the
operation of the shelf because the MX2800 is operating on the
A
Power Supply.
8. Go to the fuse panel at the top of the bay and remove the fuse corresponding to the
A
power feed.
Removing this fuse should have no effect on the operation of the shelf because the
A
Power Supply is
now running on the
B
power feed.
9. Reinsert the fuse for the
A
power feed.
10. Remove the fuse corresponding to the
B
power feed to the shelf. Removing this fuse should have no
effect on the operation of the shelf as the
A
Power Supply is operating on the
A
power feed.
11. Reinsert the fuse for the
B
power feed.
12. Reinsert the
B
Power Supply into the MX2800 chassis.